You can use any cheese you like for this -- Swiss is the classic choice, but Monterey Jack would also be great!
For crunchy topping: In small bowl, mix 2 tablespoons melted butter and 1/2 cup Progresso™ panko crispy bread crumbs. After removing foil, sprinkle with bread crumb mixture. Bake uncovered 10 to 15 minutes longer or until crumbs are golden brown.
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